I haven't played with much centerfire stuff, but I did get to shoot a savage model 12V of my buddies in .223 Rem. It would be very hard to find a better rifle for the money. The accutrigger is absolutely sweet, one of the nicest I've ever shot. He had a 6-18X44 or something scope on it, don't know what brand. The eye releif wasn't quite right for me,lot of black around the sight picture but that thing was insanely easy to shoot at 100 yards.
It felt like it was made much better than a lot of other rifles I've handled, but haven't shot. Syntehtic stock was a little flimsy around the barrel, but other than that its just about perfect.
If you want to go rimfire, I'd have to say Marlin. I've got a cheap 81TS thats about as accurate as you could ask of a sporting rifle, eats anything, and has a stock that actually fits me. I'm 6'3" and have pretty long arms, trying to shoulder a ruger 10/22 was like trying to be a contortionist.